I agree that it's not germane, since the real problem is VectorWorks communication - I didn't even see a warning until I downloaded 2019 and noticed the little red bell at the top when I opened the first file in it. An e-mail wouldn't have killed them. Nor would an apology now, but of course they'd rather blame Apple and VWX customers than even consider taking any kind of responsibility.
Also, all of these folks commenting about how 'everyone knows' you don't upgrade your OS until three service packs in are - well, lets just say they must have more time to focus on how the computer software industry works than I do. I mean, thanks for the free advice and all, but seriously, I've got too much work to do to hang out in tech forums. I'm a one-man company, and if I'm paying $7k for software with a $700 yearly subscription, I just want the software to work. As a designer, I totally cop to not being interested one iota in how the tech magic happens, anymore than a carpenter is interested in how a hammer is forged. If Vectorworks can't be bothered to take care of small shops with something as simple as an e-mail, they are going to have to write off whole industries. In entertainment (where Vectorworks is currently the favored software, followed by AutoCad and Sketchup, and Macs are the hardware of choice) we are independent contractors running one-man shows that are hired in by large companies - we don't have the luxury of a technical support department or the time to become one, and time spent figuring out how to deal with your software problems can be just as easily spent learning your competition's software, which doesn't seem to be having the same issues.
And PS - I haven't had any pressure to upgrade my OS to Mojave from Apple, but I did have Vectorworks rushing me into installing 2019. Maybe back off of that until you know it works?